1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

// Copyright (C) 2019-2022 Aleo Systems Inc.
// This file is part of the snarkVM library.

// The snarkVM library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// The snarkVM library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with the snarkVM library. If not, see <https://www.gnu.org/licenses/>.

use super::*;

impl<E: Environment, const NUM_WINDOWS: u8, const WINDOW_SIZE: u8> CommitUncompressed
    for BHP<E, NUM_WINDOWS, WINDOW_SIZE>
{
    type Input = bool;
    type Output = Group<E>;
    type Randomizer = Scalar<E>;

    /// Returns the BHP commitment of the given input and randomizer as an affine group element.
    fn commit_uncompressed(&self, input: &[Self::Input], randomizer: &Self::Randomizer) -> Result<Self::Output> {
        let mut output = self.hash_uncompressed(input)?;

        // Compute h^r.
        randomizer.to_bits_le().iter().zip_eq(&**self.random_base()).filter(|(bit, _)| **bit).for_each(|(_, base)| {
            output += base;
        });

        Ok(output)
    }
}